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Delvig [45]
3 years ago
14

Which of these is a TRUE statement? A) Sound travels through gases easier than liquids. B) Sound travels through solids easier t

han liquids. C) Sound sometimes travels easier through gases than solids. D) Sound travels through solids, liquids, and gases at the same speed.
Physics
2 answers:
lakkis [162]3 years ago
6 0
It’s B. Sound travels faster through solids than liquids. Have you ever put your head on a desk, and tap the desk? That’s an example of it going faster through solids
RUDIKE [14]3 years ago
5 0

Explanation :

A mechanical wave is of two types i.e. longitudinal waves and transverse waves.

The sound is a longitudinal wave in which the particles of the medium travel in the direction of propagation of the wave.

The sound wave travels through solids, liquids and gases at the different speed. It is maximum in solids because the particles in solids are very close to each other so that the waves pass quickly from one particle to another.

Hence, the correct option is (B) "Sound travels through solids easier than liquids".

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A commuter airplane starts from an airport and takes theroute. The plane first flies to city A, located 175 km away in a directi
bearhunter [10]

Answer:

245.45km in a direction 21.45° west of north from city A

Explanation:

Let's place the origin of a coordinate system at city A.

The final position of the airplane is given by:

rf = ra + rb + rc    where ra, rb and rc are the vectors of the relative displacements the airplane has made. If we separate this equation into its x and y coordinates:

rfX = raX+ rbX + rcX = 175*cos(30)-150*sin(20)-190 = -89.75km

rfY = raY + rbY + rcT = 175*sin(30)+150*cos(20) = 228.45km

The module of this position is:

rf = \sqrt{rfX^2+rfY^2} = 245.45km

And the angle measure from the y-axis is:

\alpha =atan(rfX/rfY) = 21.45\°

So the answer is 245.45km in a direction 21.45° west of north from city A

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The index of refraction of light varies from color to color. TRUE.
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Answer:

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